This idea has been discussed a few times on the list... eg try googling on "incremental document field update".
It's tricky; Lucene doesn't make it easy to update just a portion of a document's postings information. The implementation will be very different from updateDocument... Mike On Tue, Jun 29, 2010 at 11:58 AM, Pablo Mendes <pablomen...@gmail.com> wrote: > Hi all, > I'm looking for a functionality similar to IndexWriter.updateDocument() > > *IndexWriter.**updateDocument<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/IndexWriter.html#updateDocument%28org.apache.lucene.index.Term,%20org.apache.lucene.document.Document%29> > *(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html> > term, > Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html> > doc) > Updates a document by first deleting the document(s) containing > term and then adding the new document. > > *IndexWriter.**updateDocument<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/IndexWriter.html#updateDocument%28org.apache.lucene.index.Term,%20org.apache.lucene.document.Document,%20org.apache.lucene.analysis.Analyzer%29> > *(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html> > term, > Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html> > doc, > Analyzer<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/analysis/Analyzer.html> > analyzer) > Updates a document by first deleting the document(s) containing > term and then adding the new document. > > But instead of deleting the document containing term and then adding the new > document, > I'd like to merge the information from the new document with the document > containing the term . > > *IndexWriter.merge**Document*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html> > term, > Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html> > doc) > Updates a document by merging the information in the document > containing term and the new document. > > *IndexWriter.merge**Document*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html> > term, > Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html> > doc, > Analyzer<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/analysis/Analyzer.html> > analyzer) > Updates a document by merging the information in the document > containing term and the new document. > > I couldn't find anything like that in 3.0.2 [1], so I assume I'll have to > implement it myself. > Is the implementation of IndexWriter.updateDocument itself a good starting > point? > > Does anybody have suggestions on how to go about it? Or is it there in some > other shape or form? > Or is it absolutely discouraged? > > Thanks, > Pablo > > [1] > http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/class-use/Document.html > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
